{"id":"phalaris-tuberosa-var-stenoptera","license":"CC-BY-4.0","data":{"scientificName":"Phalaris tuberosa var. stenoptera","commonNames":["Hardinggrass"],"taxonRank":"variety","acceptedName":"Phalaris aquatica","family":"Poaceae","synonyms":["Phalaris tuberosa var. stenoptera"],"ids":{"usdaSymbol":"PHAQ","gbifKey":5289749},"usdaZoneMin":"7b","zoneSource":"usda-plants","states":["AZ","CA","DC","HI","MS","MT","NC","OR","SC","TX","VA"],"invasiveIn":[{"state":"HI","status":"invasive-reported","source":"us-riis"},{"state":"L48","status":"invasive-reported","source":"us-riis"}],"hardinessAssertions":[{"minimum":"7b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":7,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PHAQ","sourceTaxon":"Phalaris tuberosa var. stenoptera","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 24654, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z"}],"plantForm":"grass","matureHeightFt":4,"waterNeed":"high","evidence":[{"source":"nord-green-1977-psw124","verdict":"recommend","verdictRaw":"Grass species recommended for fuelbreak sites in California","claims":"Hardinggrass is printed in Table 2's California fuelbreak recommendation.","sourcePlacement":{"value":"Table 2: Grass species recommended for fuelbreak sites in California","scheme":"nord-green-brushland-clearing-performance"},"edition":"PSW-124","url":"https://research.fs.usda.gov/download/treesearch/28938.pdf","documentDate":"1977-01-01T00:00:00.000Z","accessedOn":"2026-08-25T00:00:00.000Z"}],"flammabilityClass":"fire-resistant","ratingReason":"limited-evidence","recommendation":"on-list","author":"grayson-graham","reviewStatus":"draft","lastVerified":"2026-08-25T00:00:00.000Z"},"localAssessmentInputs":{"stateDistribution":["AZ","CA","DC","HI","MS","MT","NC","OR","SC","TX","VA"],"nativeStates":[],"rangeAssertions":[{"relation":"documented-occurrence","geography":{"grain":"state","stateCodes":["AZ","CA","DC","HI","MS","MT","NC","OR","SC","TX","VA"]},"provenance":"legacy-field"}],"usdaZoneMin":"7b","usdaZoneMax":null,"hardinessAssertions":[{"minimum":"7b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":7,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PHAQ","sourceTaxon":"Phalaris tuberosa var. stenoptera","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 24654, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}],"hardinessSelection":{"status":"selected","assertion":{"minimum":"7b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":7,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PHAQ","sourceTaxon":"Phalaris tuberosa var. stenoptera","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 24654, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"},"assertions":[{"minimum":"7b","interpretation":"minimum-threshold","precision":"half-zone","zoneMapping":"derived-containing-band","sourceMeasurement":{"kind":"minimum-temperature","value":7,"unit":"degrees-fahrenheit"},"applicability":"applicable","source":"usda-plants-characteristics","sourceRecordId":"PHAQ","sourceTaxon":"Phalaris tuberosa var. stenoptera","taxonMatch":"source-identifier","sourcePlacement":"PlantCharacteristics record 24654, Temperature, Minimum (°F)","sourceVersion":"PLANTS Help Document 2022; characteristics cache retrieved 2026-08-23","asOf":"2026-08-26T00:00:00.000Z","provenance":"cited"}]},"invasiveIn":[{"state":"HI","status":"invasive-reported","source":"us-riis"},{"state":"L48","status":"invasive-reported","source":"us-riis"}],"statusAssertions":[{"status":"invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["HI"]},"source":"us-riis","provenance":"legacy-field"},{"status":"invasive","channel":"ecological","geography":{"grain":"aggregate-region","regions":["L48"]},"source":"us-riis","provenance":"legacy-field"}],"fireEvidenceClass":"fire-resistant","recommendation":"on-list","fireSourceScopes":[],"firePerformanceConditions":[],"maintenanceAssertions":[],"maintenanceConditions":null,"regulatoryReviews":{},"seedReviews":{}},"legacyCompatibilityProjection":{"nativeStates":[],"invasiveIn":[{"state":"HI","status":"invasive-reported","source":"us-riis"},{"state":"L48","status":"invasive-reported","source":"us-riis"}],"usdaZoneMin":"7b"},"localAssessmentContract":"Compare each dimension separately. State noxious-weed seed designations are material-scoped and never become non-seed plant restrictions, ecological-invasive findings, nursery restrictions, alternatives, product evidence, or fire votes. Introduced/established context is not an invasive warning. Minimum-only hardiness has no inferred maximum; canonical source-temperature conversion is validated and contradictory applicable rows project no primary zone. L48 context applies only to conterminous states and is never exact-state status. Fire-performance conditions are not maintenance advice. FEIS fire-ecology context does not vote in the plant classification. Absence of a status row is not regulatory clearance."}